GB1362292A - Rock drills - Google Patents
Rock drillsInfo
- Publication number
- GB1362292A GB1362292A GB4988971A GB4988971A GB1362292A GB 1362292 A GB1362292 A GB 1362292A GB 4988971 A GB4988971 A GB 4988971A GB 4988971 A GB4988971 A GB 4988971A GB 1362292 A GB1362292 A GB 1362292A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cylindrical portion
- grooves
- drill
- cutting element
- previously cylindrical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000011435 rock Substances 0.000 title 1
- 239000002184 metal Substances 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
- E21B10/445—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts percussion type, e.g. for masonry
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Drilling Tools (AREA)
- Earth Drilling (AREA)
Abstract
1362292 Twist drills H REINHOLDT AS 27 Oct 1971 [25 Nov 1970] 49889/71 Heading B3C [Also in Division B4] A rotary-percussive drill comprises a shank 2, a hard metal cutting element 6 and a pair of helical discharge grooves 8, 9 cut from a previously cylindrical portion 4. The surfaces 10, 11, which guide the drill in use, widen, adjacent the cutting element, to substantially a quarter of the circumference of the previously cylindrical portion. The core of the drill enveloped by the grooves is preferably a cylinder having a diameter greater than half the diameter of the previously cylindrical portion. The grooves may alternatively have the form illustrated in Fig. 3.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19702057892 DE2057892A1 (en) | 1970-11-25 | 1970-11-25 | Rock drill bits for impact drills |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1362292A true GB1362292A (en) | 1974-08-07 |
Family
ID=5789029
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4988971A Expired GB1362292A (en) | 1970-11-25 | 1971-10-27 | Rock drills |
Country Status (7)
Country | Link |
---|---|
AT (1) | AT313220B (en) |
CH (1) | CH525753A (en) |
DE (1) | DE2057892A1 (en) |
FR (1) | FR2115828A5 (en) |
GB (1) | GB1362292A (en) |
IT (1) | IT941107B (en) |
NL (1) | NL7114401A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7137461B2 (en) | 2002-10-03 | 2006-11-21 | Black & Decker, Inc. | Masonry drilling tool |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH626557A5 (en) * | 1978-09-28 | 1981-11-30 | Guex Philippe & Fils Sa | |
DE3014693A1 (en) * | 1980-04-16 | 1981-10-22 | Hilti AG, 9494 Schaan | ROCK DRILL |
DE4338667A1 (en) * | 1993-11-12 | 1995-05-18 | Hilti Ag | Drilling tool |
US5641028A (en) * | 1995-08-10 | 1997-06-24 | Black & Decker Inc. | Drill bit with debris conveying flute |
-
1970
- 1970-11-25 DE DE19702057892 patent/DE2057892A1/en active Pending
-
1971
- 1971-09-20 CH CH1368671A patent/CH525753A/en not_active IP Right Cessation
- 1971-09-22 AT AT819771A patent/AT313220B/en not_active IP Right Cessation
- 1971-10-20 NL NL7114401A patent/NL7114401A/xx unknown
- 1971-10-27 GB GB4988971A patent/GB1362292A/en not_active Expired
- 1971-11-05 FR FR7139712A patent/FR2115828A5/fr not_active Expired
- 1971-11-09 IT IT3085471A patent/IT941107B/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7137461B2 (en) | 2002-10-03 | 2006-11-21 | Black & Decker, Inc. | Masonry drilling tool |
Also Published As
Publication number | Publication date |
---|---|
DE2057892A1 (en) | 1972-06-08 |
AT313220B (en) | 1974-02-11 |
FR2115828A5 (en) | 1972-07-07 |
NL7114401A (en) | 1972-05-29 |
IT941107B (en) | 1973-03-01 |
CH525753A (en) | 1972-07-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
433D | Application made for revocation (sect. 33/1949) | ||
434A | Offer to surrender (sect. 34/1949) | ||
4336 | Case decided by the comptroller ** application not proceeded with (sect. 33/1949) | ||
434F | Withdrawal of offer to surrender allowed (sect. 34/1949) | ||
PLNP | Patent lapsed through nonpayment of renewal fees |